Fast folding structure of basketball backstop

ABSTRACT

A fast folding structure of a basketball backstop includes two bilaterally symmetric standpipes, two connecting rods riveted with each other in an X-shape, and two Y-shaped leg assemblies. The connecting rods are movably connected with the standpipes respectively. The leg assemblies are installed respectively on the standpipes, and each leg assembly includes a leg tube and a strut. A top of the strut is riveted to the leg tube, and a bottom of the strut is riveted to the standpipe. The movable connection is realized through a sliding block fitting on the standpipe. A backboard is assembled between the top ends of standpipes. Upon collecting the basketball backstop, the sliding block ascends along the standpipe; whereas the connecting rods, leg assemblies, and standpipes converge together gradually to implement the fast folding of the basketball backstop and the increase or decrease of rings flexibly.

RELATED APPLICATION

This application is a Continuation-in-Part of currently pending U.S. patent application Ser. No. 16/129,997 filed on 2018 Sep. 13.

BACKGROUND OF THE INVENTION a) Field of the Invention

The present invention relates to sporting equipment, and more particularly to a basketball backstop which is able to be folded quickly, and can be used with a backboard assembly structure in any width.

b) Description of the Prior Art

Due to the stress in working and living, the pace is accelerating and more people are in a sub-healthy state. Physical exercising is the best way to get rid of fatigue and improve the working efficiency, thereby escaping from the sub-healthy state. Therefore, the sense of the national fitness-for-all is getting popular. People would like to undertake the physical exercises after work or school, in order to enhance the body and relax themselves. However, a normal sport such as playing basketball, badminton or volleyball would require a very large place, and people cannot exercise at any time, which is not convenient. Thus, it will provide more convenience and fun to people who would like to play shooting a basketball, if a basketball backstop or a basketball shooting machine can be emplaced at home or in a yard without needing a large place. Nevertheless, all of the existing basketball backstops or basketball shooting machines use a design where a fixed frame is locked by welding or with screws, which is too large to be folded, takes up the collection space and is not easy to be carried. In addition, the conventional basketball backstop or basketball shooting machine is usually provided with a single ring. Hence, if plural rings are required, then plural basketball backstops or basketball shooting machines must be emplaced, which takes up the setting space and spends the material cost. On the other hand, if the length of a backboard is increased, then plural rings can be installed on one basketball backstop or basketball shooting machine; however, the amount of rings will not be able to be changed on demand anymore, which is not convenient in use.

SUMMARY OF THE INVENTION

The technical issue to be solved by the present invention lies in the provision of quick collection of the basketball backstop or basketball shooting machine, and of the increase or decrease of rings freely.

To solve the abovementioned technical issue, the present invention provides a technical solution as follow. The present invention discloses a fast folding structure of a basketball backstop, comprising a pair of bilaterally symmetric standpipes, a pair of connecting rods which are riveted together in X-shape, and a pair of Y-shaped leg assemblies.

The middle sections of the connecting rods are riveted with each other, two ends on bottoms of connecting rods are riveted respectively with bottoms of standpipes, and two ends on tops of connecting rods are movably connected with the middle sections of standpipes respectively.

The leg assemblies are bilaterally symmetric, and are installed respectively on the standpipes. Any one of the two leg assemblies includes a leg tube and a strut, a bottom end of the leg tube touches the ground and a top end of the leg tube is movably connected with the middle section of standpipe. A top end of the strut is riveted with the middle section of leg tube, and a bottom end of the strut is riveted with the bottom of standpipe.

Two ends on the tops of connecting rods are movably connected with the middle sections of standpipes, a top of the leg tube is movably connected with the middle section of standpipe through a sliding block, the sliding block slidingly fits on the standpipe, the connecting rod is riveted with the sliding block, and the leg tube is riveted with the sliding block.

Furthermore, the standpipes can be expanded and collected with each other through the connecting rods to adjust the distance between the standpipes, so that a backboard in any width can be assembled between the standpipes. The backboard is provided at least with a ring to constitute a basketball backstop. The connecting rod and leg tube can slide on the standpipe through the sliding block, so that the connecting rod and the leg assembly can be expanded and collected.

Accordingly, upon collecting the basketball backstop, the leg tube is made to approach the connected standpipe, move surrounding the standpipe along with the strut that is riveted to the leg tube, and ascend along the standpipe with the sliding block that is riveted to the leg tube. Simultaneously, the ascending sliding block drives the top end of the connecting rod to move upward, and the X-shaped connecting rods become upright gradually and move closer to each other, enabling the standpipes to move closer to each other, so as to implement the fast expansion and folding for the basketball backstop.

The present invention further includes a slope rack, a drapery and two side shields. The slope rack includes two extension rods and a stop rack, an end of the extension rod is riveted to the middle section of leg tube, and the stop rack is connected between the other ends of extension rods. A top end of the standpipe is higher than the stop rack, and two ends of the drapery are assembled respectively between the top ends of standpipes and the stop rack, allowing the drapery to tilt from the top ends of standpipes toward the stop rack in a top-down manner. The ring is disposed above the drapery, and the side shields are disposed on two sides of the drapery, forming an upward opened chute by enclosure with the drapery and the side shields. The drapery and the side shields are mesh fabric, the stop rack is provided with two upright posts and at least a transversal rod which is connected between tops of the upright posts. A bottom of the upright post is disposed on the other end of extension rod, a top of the standpipe is provided with a support tube which is bent toward the stop rack, and the side shields are connected between the support tubes and the stop rack. The abovementioned ring is disposed above the drapery and the chute; whereas the standpipes, connecting rods, leg assemblies, slope rack, drapery, side shields and backboard constitute a basketball backstop. In addition, as the tops of standpipes are higher than the transversal rods of the stop rack, the drapery will tilt from the tops of standpipes toward the stop rack to form a slope; whereas the upward opened chute is formed by the enclosure with the drapery and the side shields. After a user stands at the location of transversal rods of the stop rack to shoot a basketball, the basketball will drop into the chute and slide downward to return to the shooting position at the location of transversal rods of the stop rack, thereby achieving the object of practicing shooting a basketball.

Accordingly, the present invention can be further provided with a counterweight. Two sides of the counterweight are riveted respectively to the bottoms of leg tubes, and the ring is disposed on the backboard, facing toward or opposite to a surface of the counterweight. In addition, the counterweight is provided with a ground board.

The backboard includes a short backboard and a long backboard. The short backboard is provided with a single ring, and the long backboard is provided with plural rings. Depending on the width of the short backboard or the long backboard, the distance between the standpipes can be adjusted freely through the connecting rods, allowing the short backboard or the long backboard to be assembled between the top ends of standpipes that a single ring or plural rings can be selectively disposed between the top ends of standpipes.

At least one standpipe is opened with a positioning hole, and the sliding block is opened with a latch hole. Upon expanding the basketball backstop, a positioning latch can be inserted into the positioning hole and the latch hole to position the sliding block on the standpipe. On the other hand, upon collecting the basketball backstop, the positioning latch is pulled out of the positioning hole and the latch hole, so that the sliding block can slide on the standpipe.

At least one standpipe is fixed with a positioning snap ring which is disposed below the sliding block. Upon expanding the basketball backstop, the sliding block will move downward along the standpipe to touch the positioning snap ring to expand the basketball backstop completely. In collaboration with the abovementioned positioning latch, the basketball backstop can be expanded and collected easily.

A positioning rod is disposed between the strut and the connecting rod which are riveted to the bottom of a same standpipe. The strut and the connecting rod are opened respectively with an insertion hole, two ends of the positioning rod are provided respectively with an insertion portion, and the insertion portions are inserted respectively into the insertion hole of strut and the insertion hole of connecting rod, so as to stabilize the fully expanded basketball backstop. In addition, a booster rod is connected between the top of standpipe and the middle section of leg tube.

The basketball backstop structure of the present invention can achieve the effect of fast folding, and the folded basketball backstop takes up a small space to facilitate storage.

To enable a further understanding of the objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of a fast folding structure of a basketball backstop.

FIG. 2 shows a perspective exploded view of FIG. 1.

FIG. 3 shows a perspective exploded view of FIG. 2.

FIG. 4 shows a local assembly view of FIG. 3.

FIG. 4A shows a partial enlarged view at a location A in FIG. 4.

FIG. 4B shows a local schematic view along direction B in FIG. 4.

FIG. 4C shows a local schematic view along direction C in FIG. 4.

FIG. 5 shows a schematic view of FIG. 4 from another viewing angle.

FIG. 5D shows a partial enlarged view at a location D in FIG. 5.

FIG. 6 shows a schematic view of a usage state of FIG. 4.

FIG. 7 shows a schematic view of another usage state of FIG. 4.

FIG. 8 shows a schematic view of still another usage state of FIG. 4.

FIG. 9 shows a perspective view of another usage state of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIGS. 1 to 4, the present invention comprises a pair of laterally symmetric standpipes 10, 100, a pair of connecting rods 21, 22 which are riveted together in X-shape, and a pair of Y-shaped leg assemblies 30, 300.

The connecting rods 21, 22 are riveted with each other by middle sections 211, 221. Two ends on bottoms of the connecting rods 21, 22 are riveted respectively to bottom ends 101 of the standpipes 10, 100. More specifically, a left end 222 on the bottom of connecting rod 22 is riveted to the bottom end 101 of left standpipe 100; whereas, a right end 212 on the bottom of connecting rod 21 is riveted to the bottom end 101 of right standpipe 10.

Two ends on tops of the connecting rods 21, 22 are movably connected with middle sections 102 of the standpipes 10, 100 respectively. More specifically, a left end 213 on the top of connecting rod 21 is movably connected with the middle section 102 of left standpipe 100; whereas, a right end 223 on the top of connecting rod 22 is movably connected with the middle section 102 of right standpipe 10.

The leg assemblies 30, 300 are laterally symmetric and installed respectively on the standpipes 10, 100. More specifically, the left leg assembly 300 is installed on the left standpipe 100 and is disposed in front of the left standpipe 100; whereas, the right leg assembly 30 is installed on the right standpipe 10 and is disposed in front of the right standpipe 10.

In the pair of leg assemblies 30, 300, any one leg assembly 30, 300 includes a leg tube 31 and a strut 32. More specifically, a bottom end 311 of the leg tube 31 in the left leg assembly 300 touches the ground, and a top end 312 of the left leg tube 31 is movably connected with the middle section 102 of left standpipe 100. Similarly, the bottom end 311 of the leg tube 31 in the right leg assembly 30 touches the ground, and the top end 312 of right leg tube 31 is movably connected with the middle section 102 of right standpipe 10. A top end 321 of the strut 32 in the left leg assembly 300 is riveted to a middle section 313 of the leg tube 31, and a bottom end 322 of the strut 32 in the left leg assembly 300 is riveted to the bottom end 101 of left standpipe 100. Similarly, the top end 321 of the strut 32 in the right leg assembly 30 is riveted to the middle section 313 of leg tube 31, and the bottom end 322 of the strut 32 in the right leg assembly 30 is riveted to the bottom end 101 of right standpipe 10.

Referring to FIG. 4 and FIGS. 4A to 4C, the movable connection of the left end 213 on the top of connecting rod 21 with the middle section 102 of left standpipe 100, and the movable connection of the top end 312 of the leg tube 31 in the left leg assembly 300 with the middle section 102 of left standpipe 100, are realized through a left sliding block 400. The left sliding block 400 is provided with a through-hole 401, allowing the sliding block 400 to slidingly fit on the left standpipe 100 by the through-hole 401. The left end 213 on the top of connecting rod 21 is riveted to the left sliding block 400, and the top end 312 of left leg tube 31 is riveted to the left sliding block 400.

Similarly, the movable connection of the right end 223 on the top of connecting rod 22 with the middle section 102 of right standpipe 10, and the movable connection of the top end 312 of the leg tube 31 in the right leg assembly 30 with the middle section 102 of right standpipe 10, are realized through a right sliding block 40. The right sliding block 40 is provided with a through-hole 401, allowing the sliding block 40 to slidingly fit on the right standpipe 10 by the through-hole 401. The right end 223 on the top of connecting rod 21 is riveted to the right sliding block 40, and the top end 312 of right leg tube 31 is riveted to the right sliding block 40.

Referring to FIG. 4 and FIG. 4B, the riveting of the left end 222 on the bottom of connecting rod 22 with the bottom end 101 of left standpipe 100, and the riveting of the bottom end 322 of the strut 32 in the left leg assembly 300 with the bottom end 101 of left standpipe 100, are realized through a left riveting seat 500. The left riveting seat 500 is installed on the bottom end 101 of left standpipe 100, the left end 222 on the bottom of connecting rod 22 is riveted on the left riveting seat 500, and the bottom end 322 of the strut 32 in the left leg assembly 300 is riveted on the left riveting seat 500.

Similarly, the riveting of the right end 212 on the bottom of connecting rod 21 with the bottom end 101 of right standpipe 10, and the riveting of the bottom end 322 of the strut 32 in the right leg assembly 30 with the bottom end 101 of right standpipe 10, are realized through a right riveting seat 50. The right riveting seat 50 is installed on the bottom end 101 of right standpipe 10, the right end 212 on the bottom of connecting rod 21 is riveted on the right riveting seat 50, and the bottom end 322 of the strut 32 in the right leg assembly 30 is riveted on the right riveting seat 50.

Referring to FIG. 5 and FIG. 5D, the middle section 102 of right standpipe 10 is opened with a positioning hole 11, the right sliding block 40 is opened with a latch hole 402, and a positioning latch 41 is inserted into the positioning hole 11 and the latch hole 402 to position the sliding block 40 on the standpipe 10.

The middle section 102 of right standpipe 10 is installed with a positioning snap ring 42. The positioning snap ring 42 is disposed below the right sliding block 40 to limit the sliding block 40 from moving downward.

Referring to FIG. 4B, a positioning rod 23 is disposed between the strut 32 of right leg assembly 30 and the connecting rod 21, with the right leg assembly 30 and the connecting rod 21 being riveted to the bottom end 101 of right standpipe 10. The strut 32 and the connecting rod 21 are opened respectively with an insertion hole 323, 214, two ends of the positioning rod 23 are provided respectively with an insertion portion 231, and the insertion portions 231 on two ends of the positioning rod 23 are inserted into the insertion hole 323 of the strut 32 as well as the insertion hole 214 of the connecting rod 21, allowing the leg assembly 30 to be more stable.

Referring to FIGS. 1 to 3, the present invention further comprises a slope rack 60, a drapery 71, two side shields 72 and a backboard 80. The slope rack 60 includes two extension rods 61 and a stop rack 62. A rear end 611 of the extension rod 61 is riveted to the middle section 313 of leg tube 31. Being connected between front ends 612 of the two extension rods 61, the stop rack 62 is provided with two upright posts 621, and at least a transversal rod 622 which is connected between top ends of the upright posts 621. A bottom end of the upright post 621 is disposed on the front end 612 of extension rod 61, and the top ends 103 of standpipes 10, 100 are higher than the transversal rods 622 of stop rack 62.

Two ends of the drapery 71 are assembled respectively between the top ends 103 of standpipes 10, 100 and the transversal rods 622 of stop rack 62, allowing the drapery 71 to tilt from the top ends 103 of standpipes 10, 100 toward the stop rack 62 in a top-down manner to form a slope. The side shields 72 are disposed respectively on a side of the drapery 71, forming an upward opened chute 70 by enclosure with the drapery 71 and the side shields 72. The drapery 71 and the side shields 72 can be mesh fabric. The backboard 80 is assembled between the top ends 103 of standpipes 10, 100, and rings 81 are disposed above the drapery 71 and the chute 70. The backboard 80 is provided at least with a ring 81, allowing the standpipes 10, 100, connecting rods 21, 22, leg assemblies 30, 300, slope rack 60, drapery 71, side shields 72 and backboard 80 to constitute a basketball backstop for shooting a basketball. According to the abovementioned structure, as the top ends 103 of standpipe 10, 100 are higher than the transversal rods 622 of stop rack 62, the drapery 71 will tilt from the top ends 103 toward the stop rack 62 in the top-down manner to form the slope, and the upward opened chute 70 is formed by the enclosure with the drapery 71 and the side shields 72; therefore, after a user stands at the location of the transversal rods 622 of stop rack 62 to shoot a basketball, the basketball will drop into the chute 70 and slide downward, returning back to the location where the user shot the basketball at the location of the transversal rods 622 of stop rack 62. In addition, the top ends 103 of standpipes 10, 100 are provided with support tubes 104 which are bent toward the stop rack 62, and the side shields 72 are connected between the support tubes 104 and the stop rack 62. In addition, a booster rod 12 is connected between the top end 103 of standpipe 10, 100 and the middle section 313 of leg tube 31 to assist stabilization. Upon collecting the basketball backstop, the user mainly operates the leg tubes 31 in the leg assemblies 30, 300, or any standpipe 10, 100 in the pair of standpipes 10, 100. When the leg tube 31 of left leg assembly 300 is being put upright gradually, the leg assembly 300 will be driven to move closer to the left standpipe 100 at a same time. Similarly, when the leg tube 31 of right leg assembly 30 is being put upright gradually, the leg assembly 30 will be driven to move closer to the right standpipe 10 at a same time. And when the sliding blocks 40, 400 of both standpipes 10, 100 ascend, the leg tube 31 of left leg assembly 300 and the left end 213 on the top of connecting rod 21, as well as the leg tube 31 of right leg assembly 30 and the right end 223 on the top of connecting rod 22 will be driven to ascend, so that the leg assemblies 30, 300 and the connecting rods 21, 22 can be converged gradually.

Upon expanding the basketball backstop, the sliding blocks 40, 400 of standpipes 10, 100 descend, whereas the leg assemblies 30, 300 and the connecting rods 21, 22 are expanded gradually. When the sliding block 40 touches the positioning snap ring 42, the basketball backstop is expanded completely. Next, the positioning latch 41 is used to position the sliding block 40 on the standpipe 10, and in the meantime, the strut 32 of right leg assembly 30 is connected to the adjacent connecting rod 21 by the positioning rod 23 to stabilize the basketball backstop. After that, the booster rods 12, slope rack 60, drapery 71, side shields 72 and backboard 80 are assembled on the standpipes 10, 100 and the leg assemblies 30, 300. Accordingly, the connecting rods 21, 22 and the leg tubes 31 can slide up and down on the standpipes 10, 100 through the sliding blocks 40, 400, thereby expanding and collecting the connecting rods 21, 22 and the leg assemblies 30, 300 to quickly and easily expand and collect the basketball backstop, which will not take up a storage space and can facilitate transporting and carrying.

Referring to FIGS. 6 to 8, the backboard 80 can include a short backboard 801 and at least a long backboard 802, 803. The length of the long backboard 803 is larger than that of the long backboard 802, the short backboard 801 is provided with a single ring 81, and the long backboard 802 is provided with plural rings 81. For example, the long backboard 802 is provided with two rings 81, and the long backboard 803 is provided with three rings 81.

Upon expanding the standpipes 10, 100 and the connecting rods 21, 22, the standpipes 10, 100 can be expanded and collected with each other through the connecting rods 21, 22 to adjust the distance h between the standpipes 10, 100, providing for the backboard 80 in any width to be assembled between the top ends 103 of standpipes 10, 100. For example, if one ring 81 is to be provided (as shown in FIG. 6), then the standpipes 10, 100 can be expanded according to the width of short backboard 801, and the distance h between the standpipes 10, 100 can be adjusted freely through the connecting rods 21, 22, so that the short backboard 801 can be assembled exactly between the top ends 103 of standpipes 10, 100. On the other hand, if two rings 81 are to be provided (as shown in FIG. 7), then the standpipes 10, 100 can be expanded according to the width of long backboard 802, and the distance h1 between the standpipes 10, 100 can be adjusted freely through the connecting rods 21, 22, so that the long backboard 802 can be assembled exactly between the top ends 103 of standpipes 10, 100. Similarly, if three rings 81 are to be provided (as shown in FIG. 8), then the standpipes 10, 100 can be expanded according to the width of long backboard 802, and the distance h2 between the standpipes 10, 100 can be adjusted freely through the connecting rods 21, 22, so that the long backboard 803 can be assembled exactly between the top ends 103 of standpipes 10, 100. Accordingly, a single ring 81 or plural rings 81 can be easily and freely disposed between the top ends 103 of standpipes 10, 100, and the amount of rings 81 can be adjusted and changed freely on demand; there is no need to emplace plural basketball backstops or basketball shooting machines, and it does not take up the setting space, and can save the material cost of the basketball backstop or the basketball shooting machine. Referring to FIG. 9, the present invention further comprises a counterweight 90. The counterweight 90 is provided with a ground board, and two sides of the counterweight 90 are riveted respectively on the bottom end 311 of leg tube 31. The ring 81 is disposed on a backboard 804 to face toward or opposite to a surface of the counterweight 90, so that the backboard 804 can be hung up on a front face or rear face depending on the need, thereby improving the convenience in use.

It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims. 

What is claimed is:
 1. A fast folding structure of a basketball backstop, comprising a pair of bilaterally symmetric standpipes, a pair of connecting rods which are riveted together in X-shape, and a pair of Y-shaped leg assemblies, wherein middle sections of the connecting rods are riveted with each other, two ends on bottoms of the connecting rods are riveted respectively to bottom ends of the standpipes, two ends on tops of the connecting rods are movably connected with the middle sections of standpipes respectively, the leg assemblies are bilaterally symmetric and are installed respectively on the standpipes, each leg assembly includes a leg tube and a strut, a bottom end of the leg tube touches the ground and a top end of the leg tube is movably connected with the middle section of the standpipe, a top end of the strut is riveted to the middle section of standpipe and a bottom end of the strut is riveted to the bottom end of standpipe, the movable connection of two ends on the tops of connecting rods with the middle sections of standpipes and the movable connection of the top ends of leg tubes with the middle sections of standpipes are realized through a sliding block, the sliding block slidingly fits on the standpipe, the connecting rod is riveted to the sliding block, and the leg tube is riveted to the sliding block, with that the standpipes are expanded and collected with each other through the connecting rods to adjust the distance between the standpipes for assembling a backboard in any width between the top ends of standpipes, the backboard is provided with a ring to constitute a basketball backstop, the connecting rods and the leg tubes slide on the standpipes through the sliding blocks to expand and collect the connecting rods and the leg assemblies, thereby quickly expanding and collecting the basketball backstop.
 2. The fast folding structure of a basketball backstop, according to claim 1, further comprising a slope rack, a drapery and two side shields, wherein the slope rack includes two extension rods and a stop rack, an end of the extension rod is riveted to the middle section of leg tube, the stop rack is connected between the other ends of extension rods, the top end of standpipe is higher than the stop rack, two ends of the drapery are assembled respectively between the top ends of standpipes and the stop rack that the drapery tilts from the top ends of standpipes toward the stop rack in a top-down manner, the ring is disposed above the drapery, and the side shields are disposed respectively on two sides of the drapery.
 3. The fast folding structure of a basketball backstop, according to claim 2, wherein the drapery or side shield is mesh fabric, the stop rack is provided with two upright posts and a transversal rod which is connected between the top ends of upright posts, a bottom end of the upright post is disposed on the other end of extension rod, the top end of standpipe is provided with a support tube which is bent toward the stop rack, and the side shields are connected between the support tubes and the stop rack.
 4. The fast folding structure of a basketball backstop, according to claim 1, further comprising a counterweight, wherein two sides of the counterweight are riveted respectively to the bottom ends of leg tubes, and the ring is disposed on the backboard, facing toward or opposite to a surface of the counterweight.
 5. The fast folding structure of a basketball backstop, according to claim 4, wherein the counterweight is provided with a ground board.
 6. The fast folding structure of a basketball backstop, according to claim 1, wherein the backboard includes a short backboard and a long backboard, the short backboard is provided with a single ring, the long backboard is provided with plural rings, the distance between the standpipes is adjusted freely through the connecting rods according to the width of short backboard and long backboard, allowing the short backboard or the long backboard to be assembled between the top ends of standpipes to selectively dispose a single ring or plural rings between the top ends of standpipes.
 7. The fast folding structure of a basketball backstop, according to claim 2, wherein the backboard includes a short backboard and a long backboard, the short backboard is provided with a single ring, the long backboard is provided with plural rings, the distance between the standpipes is adjusted freely through the connecting rods according to the width of short backboard and long backboard, allowing the short backboard or the long backboard to be assembled between the top ends of standpipes to selectively dispose a single ring or plural rings between the top ends of standpipes.
 8. The fast folding structure of a basketball backstop, according to claim 4, wherein the backboard includes a short backboard and a long backboard, the short backboard is provided with a single ring, the long backboard is provided with plural rings, the distance between the standpipes is adjusted freely through the connecting rods according to the width of short backboard and long backboard, allowing the short backboard or the long backboard to be assembled between the top ends of standpipes to selectively dispose a single ring or plural rings between the top ends of standpipes.
 9. The fast folding structure of a basketball backstop, according to claim 1, wherein one standpipe is opened with a positioning hole, the sliding block is opened with a latch hole, a positioning latch is inserted into the positioning hole and the latch hole to position the sliding block on the standpipe, the standpipe is installed with a positioning snap ring, and the positioning snap ring is disposed below the sliding block to limit the sliding block from moving downward.
 10. The fast folding structure of a basketball backstop, according to claim 1, wherein a positioning rod is disposed between the strut and the connecting rod which are riveted on the bottom end of a same standpipe, the strut and the connecting rod are opened respectively with an insertion hole, two ends of the positioning rod are provided respectively with an insertion portion, and the insertion portions on two ends of the positioning rod are inserted respectively into the insertion hole on the strut and the insertion hole on the connecting rod, thereby enabling the leg assemblies to be more stabilized, with a booster rod being connected between the top end of standpipe and the middle section of leg tube. 